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#include <fstream>
using namespace std;
ifstream in("scmax.in");
ofstream out("scmax.out");
int v[100001], d[100001],leg[100001], rez[100001];
int main()
{
int n;
in>>n;
for(int i=1; i<=n; i++)in>>v[i];
for(int i=1; i<=n; i++)
{
d[i]=1;
for(int j=i-1; j>=1; j--)
{
if(v[i]>v[j] && d[j]+1>d[i])
{
d[i]=d[j]+1;
leg[i]=j;
}
}
}
int mx_len=0, poz=0;
for(int i=1; i<=n; i++)
if(d[i]>mx_len)
{
mx_len=d[i];
poz=i;
}
out<<mx_len<<'\n';
while(poz)
{
rez[++rez[0]]=v[poz];
poz=leg[poz];
}
for(int i=mx_len; i>=1; i--)
{
out<<rez[i]<<" ";
}
in.close();
out.close();
return 0;
}